Dental bracket



(No Model.) '2 Sheetsuheet 1.

E. R. P ETTIT. DENTAL BRACKET.

m. 2M. w, N @y Patented Aug. 8, 1893.

UNITE-D ASTATI-:s

PATENT OFF-ICE.

ELIHU R. PE'ITIT, OF PHILADELPHIA, PENNSYLVANIA.

DENTALu-BRACKET.

SPECIFICATION forming part of Letters Patent No. 502,933, dated August8, 1893.-

Application iiled December 31, 1889. Serial No. 335,536. (No model.)

To all whom it may concern:

Be it known that I, ELIHU R. PETTIT, a citizen of the United States,residing in the city and county of Philadelphia, State of Penn--sylVauia,-have invented-a new and useful' Improvement in DentalBrackets, which improvement is fully set forth in the followingspecication and accompanying drawings.

My invention relates to dental brackets, and consists of a supportjarigid arm movably attached to, said support, an automatically operatingeccentric in connection with said arm for locking the same in ahorizontal position at varying heights, and an arm attached to saideccentric andsaid support.

My invention further consists of the ynovel construction of the tablehereinafter set forth and claimed.

Figure 1 represents asectional perspective view of a dental bracketembodying my invention. Fig. 2 represents an enlarged sectionalelevation of the automatic device and a portion of the bracket arm. Fig.3 represents a perspective View of my improved table. Fig. 4 representsa cross-sectional view of the bracket arm. Fig. 5V represents asectional elevation of a portion of the table and arm. Fig. 6 representsa modification of the arm. Fig. 7 represents a modilied form of theeccentric. Fig. Srepresents a perspective view of-a modied form of thebracket, showof the arm shown in Fig. 8. Fig. 10 represents aperspective view of a modified form of the bracket' showing a diiferentmode of applying the'locking eccentric. Fig. 11 represents a sectionalelevation of a portion of the arm showing a modification of thelockingeccentric. Fig. 12 represents atransverse section on the line 0c, oo,Fig. 11. Fig. 13 representsa detail perspective view of the eccentricand attachment shownin Fig; 10.

Similar letters of reference indicate corresponding parts'in the severalfigures.

Referring to the drawings: A, designates a support adapted to beattached to the wall or other place of securement, and formed withapertured ears c, to receive a mainvertical post B. Said post B hasmovementin said ears a, and. is provided v with two cross-bars C,connected by uprightsD, upon which are 'pivotlally mounted the armsE ofayoke F, attached to an arm G, constructed either of tubing, as shown inFigs. 1, 2 and 4, or of a solid bar, as shown in Figs. 6 and 10, and inthe-latterinstance, the locking device will be applied to the lower partof the outside of the bar. The yoke F is connected to the arm G, and tosaid latter arm is attacheda round or angular slotted bar H, the outerend of which is pivoted in the tubular arm G, or substitutedlbya rigidsupport on the outside of a solid jarm, as shown. Screws J and K, Figs.1, 2, and 4, engage bearing plates L, located on the upper and lowersides of the said bar H., The screw J is set so that the horizontalposition ofthe slotted bar H will be changed or slightly moved at anangle to the horizontal, to permit the eccentric N, to take hold andprevent the movement of the roller M within the slot, when the supportis moved. The screw K is so adjusted that when the bar II rests upon it,the slot insaid bar is exactly horizontal, or at right angles to thebars D, D. It will be understood that a slight upward play of the arm H;is allowed by setting the screw J, to permit the said arm to slightlyrock, the degree of adjustment being reguvlable as desired. ing the armdirectly connected to the support. Fig. 9 represents aside elevation ofa portion Within the sloto-fthe bar l-I, is mounted a roller M-connectedto a locking eccentric N by a yoke P, or its equivalent, the said eccen-`tric having a square, angular or an ovalfopening Q, shown in Fig. 7,the said opening being slightly vlarger than an axle R1 passingtherethrough, and to which the yokeP is attached. The eccentric Npisarranged at an angle to a Vertical plane, andthe opening Q therethroughis substantially at a right angle to the yoke P. The said opening beingslightly larger than the said yoke, allows the latter to bear againstthe walls of said openings, and move the eccentric to overcome theresistance of a spring Y connected to the lower -portion of saideccentric N, when it is desired to lower the arm G. The forward end of ayoked arm S, is connected to roller M, extending through a slot T, cutthrough the arm G, and the opposite end of said arm S is pivotallyconnected to the post B. The outer end of the arm G is formed withasocket or opening U, Fig. 5, in which is movably mounted a stud or postV secured adjacent to the inner end of a table W. The said table W isdividedinto a large compartment W for the reception of tools orinstruments,andintosub-divided compartments W2, in the rear ofcompartment W for the reception of gold and other materials for fillingteeth, dsc. One side of the table is formed with a Veshaped receptacleor holder X, hinged at its lower part, to which is secured a board X ofthe table, the said receptacle being adapted to be folded back into arecess into the table. Said receptacle X is preferably formed with aseries ot' holes for the reception of drills and other instruments foruse with the dental env eine.

a To secure the receptacleX in a folded position against the table, aspringor other suitable catch Yis attached to the receptacle and engagesthe table.

As shown in Fig. 2, a small lever Y2 is secured to the arm G, one endthereof working through an opening to bear against bar II, to hold thelatter in a horizontal position, when a more rapid downward movement isdesired, said device being operated by the thumb and one finger, to holdthe said bar H down until the lever is released. When the arm G israised, the free end of the slotted bar II descends slightly, and restsin a horizontal position on the lower plate L supported by the screw K.The arm S draws backward on the roller M, and drawing on the yoke P,moves the section N out of its locking position, and has a free movementin this direction. It will be understood that the eccentric N is drawnback by the yoke P, against the resistance odered by the spring Y',which latter spring always tends t0 draw the eccentric into a lockingposition.

To lower the arm G, it is only necessary to support its weight with thehand, so that the slotted bar Il will rest upon the lower plate L in ahorizontal position, when a slow downward movement of the hand willcause the arm G to descend, so long as the movement is not suiiicientlyrapid to change the slotted bar H from the horizontal. By suddenlyremoving the hand supporting the weight, the latter will instantly causethe bar II to change from its horizontal position, and the eccentric Nwill clamp and hold the bar firmly in position, with only an extremelysmall additional movement downward, depending upon the position in whichthe. screw J has been set. It will be seen that the arm G can also bemoved 1aterally by the pivotal connection of the post B with thesupports A.

In Figs. S and 9, the bar G is shown slotted, as at G', and the use ofthe bar 1I is dispensed with. The eccentric N is employed alone andwithout the roller M and yoke T,

the arms S being connected to each side of said eccentric and to theuprights D of the bracket proper. In this instance the coiled spring Yis connected to the eccentric N, and one ofthe arms S, and saideccentric has a sliding movement in the arm G as the latter is elevatedand lowered.

In Fig. lO, a post B and supports A are used without the uprights D andcross bars C. The arm G has a lower bracket G2 secured thereto to form aslot therewith, in which slot is mounted the eccentric N attached to ayoked arm S, said arm S being movably Iixed to the post B, and havingthe the spring Y connected to one portion thereof and to the eccentricN. In this instance, the eccentric has a sliding movement when the arm Gis raised or lowered, and a rod N is attached thereto for unlocking thesaid eccentric when lowering said arm G.

In Figs. ll and v12 the arm G is shown formed with a horizontal slot G',and a vertical slot G3 at a right angle to said slot G. `The eccentric Nis formed with a slot N2, to provide a bearing N3, which is surroundedby a loop S', formed with the end of a single arm S, adapted to beattached to apost B. In this instance, the eccentric N has a slidingmovement in the slot G.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. In a dental bracket, a support, a rigid arm' movably attached to saidsupport, to

have a vertical and lateral adjustment, an automatically operatingeccentric in connection with said arm, for locking the same in ahorizontal position at varying heights, and an arm Sattached to saideccentric and said support, substantially as described.

2. In a dental bracket, a support, a rigid arm supporting a tablemovably attached to said support, so as to be adjustable laterally andvertically, a slotted bar mounted in said arm, an automatic lockingattachment located in said slotted bar, and an arm movably secured atits ends respectively to said locking attachment, and to said support,substantially as described.

3. In a dental bracket, an adjustable arm supporting a table, a barconnected to said arm, an automatically operating locking attachmentcarried by said bar, and screws engaging opposite sides of said bar, foradjusting the same, substantially as described.

4. In a dental bracket, an adjustable bar `attached to an arm supportinga table, combined with a locking device consisting of a lockingeccentric, a roller attached to said eccentric, and an arm attached tosaid roller, and to the support of the bracket, substantially asdescribed.

5. In a dental bracket, an arm supporting a table having` a lateraladjustment, a slotted har adjustably attached to said arm, a lockingdevice mounted in said bar, and an arm IOO IIO

Secured to said locking device aud pvotally ing au outside ap or stripadapted to be attached to a support, substantially as delockedagainstthe side of the table, substanzo Scrbf. b1 d tially as described.Y

6. ta e for dental purposes provi ed f with a V-shaped hinged pieceattached to one ELHIU R' PETTI F' side thereof; having apertures thereinfor Witnesses: tools, and adapted to be folded back in a re- JOHN A.WIEDERSHEIM, cess in said table, said V- shaped piece hav- WM. C.WIEDERSHEIM.

